中外公路2025，Vol.45Issue(2)：99-105,7.DOI:10.14048/j.issn.1671-2579.2025.02.011
松散性半刚性基层沥青混凝土路面改扩建关键技术研究
Research on Key Technologies for Reconstruction and Expansion of Loose Semi-Rigid Base Asphalt Concrete Pavement
摘要
Abstract
Some early-constructed semi-rigid base asphalt concrete pavements have severe looseness in the base layer,which makes it impractical to evaluate the fatigue life of the inorganic binder-stabilized layer for pavement reinforcement under these conditions.This kind of pavement widening project is affected by the condition of the existing pavement condition,raised elevation,traffic management,pavement regeneration,and other factors.Consequently,such projects pose significant challenges in reconstruction and expansion design.To address the key technical issues in reconstructing and expanding loose semi-rigid base asphalt concrete pavements,this article focused on the Shenzhen‒Shanwei West Expressway reconstruction and expansion project.Pavement overlay strengthening and widening techniques were studied through theoretical calculation and practical validation.The results show that by complying with relevant standards and considering pavement condition,the loose cement-stabilized base layer is treated as an unbound aggregate layer,and loose semi-rigid base asphalt pavement is simplified into a layered system comprising asphalt-bound material layer,an aggregate base layer,and the subgrade.A pavement structure reinforcement solution that meets regulatory standards is obtained.For scenarios involving different raised elevations of the existing pavement,factors such as split-width pavement scheme,construction feasibility,and traffic management are considered to obtain tailored pavement levelling solutions.For widening pavement,factors such as project traffic management,traffic distribution,and pavement regeneration need to be considered,and techniques such as step construction,body bolsters,and glass fiber grilles can be applied to enhance the quality of joints in loose base asphalt pavements.The first-stage project of the Shenzhen‒Shanwei West Expressway reconstruction and expansion was completed two years ago,and the pavement remains in good condition.The results confirm the effectiveness of the proposed pavement reconstruction and extension solution,offering insights and references for similar projects.关键词
松散性半刚性基层/路面改扩建/关键技术Key words
loose semi-rigid base/pavement construction and expansion/key technique分类
交通工程引用本文复制引用
肖冠成..松散性半刚性基层沥青混凝土路面改扩建关键技术研究[J].中外公路,2025,45(2):99-105,7.基金项目
广东省科技计划项目(编号:2021B1111610002) （编号:2021B1111610002）
